<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8" />
  <meta http-equiv="X-UA-Compatible" content="IE=edge" />
  <meta name="viewport" content="width=device-width, initial-scale=1.0" />
  <title>Document</title>
  <script src="https://cdn.jsdelivr.net/npm/vue@2.6.10/dist/vue.js"></script>
</head>

<body>
  <!-- 
    1. 默认search是空字符串 所以筛选了全部
    2. search 和input双向绑定
   -->
  <div id="app">
    <input type="text" v-model="search" />
    <ul>
      <li v-for="item in finallyPersons" :key="item.id">
        姓名:{{item.name}}---年龄:{{item.age}}
      </li>
    </ul>
  </div>
  <script>
    Vue.config.productionTip = false;

    const vm = new Vue({
      el: "#app",
      data () {
        return {
          search: "",
          /* 
            在排序搜索过滤等等操作中,我们尽量不要操作原来的数据,因为我们可能还要回去最初的操作
            一般来说过滤等操作都是重新定义一个数据保存过滤后的值
          */
          persons: [
            { id: "001", name: "周杰伦", age: 19 },
            { id: "002", name: "陈奕迅", age: 25 },
            { id: "003", name: "周杰", age: 39 },
            { id: "004", name: "陈冠希", age: 7 },
            { id: "005", name: "谢坤", age: 22 },
            { id: "006", name: "杨坤", age: 14 },
            { id: "007", name: "谢霆锋", age: 11 },
          ],
        };
      },
      computed:{
        finallyPersons(){
          return this.persons.filter((item)=>(
            item.name.includes(this.search)
          ))
        }
      }
    });
  </script>
</body>

</html>